TM 5-3895-382-24
Belt Tension Chart
SMCS Code: 1357
Table 8
Belt Tension Chad
Gauge Reading
Borroughs
Gauge Number
Belt Size
Belt Width
Belt Tension
“Initial” (1)
Belt Tension
“Used” (2)
Old
Gauge
Number
New
Gauge
Number
3/8
10.72 mm (0.422 Inch)
445 ± 22 N (100 ± 5 lb)
400 ± 22 N (90 5 lb)
BT-33-95
BT-33-97
1/2
13.89 mm (0.547 Inch)
534 ± 22 N (120 5 lb)
400 ± 44 N (90 10 lb)
BT-33-95
BT-33-97
5V
15.88 mm (0.626 Inch)
534 ± 22 N (120 ± 5 lb)
400 ± 44 N (90 10 lb)
BT-33-72
BT-33-72C
11/16
17.48 mm (0.688 Inch)
534 22 N (120 ± 5 lb)
400 ± 44 N (90 10 lb)
BT-33-72
BT-33-72C
3/4
19.05 mm (0.750 Inch)
534 ± 22 N (120 5 lb)
400 ± 44 N (90 10 lb)
BT-33-72
BT-33-72C
15/16
23.83 mm (0.983 Inch)
534 ± 22 N (120 5 lb)
400 44 N (90 10 lb)
BT-33-72
BT-33-77
8K
27.92 mm (1.099 Inch)
800 22 N (180 ± 5 lb)
489 ± 44 N (110 ± 10 lb)
------
BT-33-109
6PK
20.94 mm (0.824 Inch)
667 22 N (150 5 lb)
467 ± 44 N (105 ± 10 lb)
------
BT-33-109
Measure the tension of the belt that is farthest from the engine.
(1) Belt Tension “Initial” is for a new belt.
(2) Belt Tension “Used” for a belt with over 30 minutes of operation at the rated speed.
Fan Drive
SMCS Code: 1359
Illustration 56
(1)
Bore of housing for
bearing ...............................................41.965 to 41.978 mm
(1.6522 to 1.6537 inch)
Outside diameter of bearing ...........................41.99 to 42.00 mm
(1.653 to 1.654 inch)
Interference fit of bearing in
housing ..............................................................0.009 to 0.035 mm
(0.0004 to 0.0014 inch)
(2)
Bore of hub.........................................21.938 to 21.958 mm
(0.8637 to 0.8645 inch)
Outside diameter of shaft.............................21.987 to 22.000 mm
(0.8656 to 0.8661 inch)
Interference fit of shaft in hub .........................0.029 to 0.062 mm
(0.0011 to 0.0024 inch)
Maximum permissible end play of shaft ..........................0.20 mm
(0.008 inch)
(3)
Install the hub on the shaft to the
dimension (3).....................................115.3 mm (4.54 inch)
5-40
